POWERHEAD
DISASSEMBLY - 25/30
IMPORTANT: Remove the lower main bearing
only
if
it needs to be replaced.
Using external retaining
ring
pliers, remove the
lower bearing retaining
ring.
Using an appropriate
bearing separator
place separator flats against the
bearing.
Support the bearing and separator and
press crankshaft from bearing.
Remove the rings from the pistons using piston
ring expanders.
DO
NOT try to save the rings.
Install a complete set of new rings at reassembly.
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Using Retaining Ring Pliers or equivalent,
remove the wrist pin retaining rings. Discard the
rings.
192
The fit between the wrist pin to bosses of the pis-
ton
is
loose on both sides. Push the wrist pin
through to free the piston from the connecting rod.
If necessary, use Piston Cradle,
PIN
326573, and
Wrist
Pin
Pressing Pin,
PIN
326356. With the pis-
ton skirt
flush with the cradle, press out the wrist
pin using
an
arbor press.
Be
careful not to lose
any of the 28 needle bearings or the two wrist pin
washers.
If any of the needle bearings are worn or
lost, replace bearing assembly.
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